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Adding a Wireless Rain Sensor to Hardie HHA 11272 Controller

Need to install wireless rain sensor on Hardie HHA 11272; no dedicated sensor terminals visible.

Wiring Method

Rain sensors break the common wire. Sensor has two wires. Disconnect field common (C) from controller. Connect one sensor wire to C terminal. Wire-nut the other sensor wire to the disconnected field common. This interrupts common when rain detected.

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